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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efcae51b36eb1e1568e05395064f5c6baef2690e998868bfd72f8fa6a47e904f' 
  AND token = 'VwQ0bLZ2563pYP7TzP10ki/poQYf1hDL3KAKNuscAxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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