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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a7bde43e341b5b050e6c5160775ce5f06d293ddeca5c2882fdeef8341b90e11' 
  AND token = 'GovPRbaEHYVHMCQw69J+qsMXMlvZgOX5t13wjnybsN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}