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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da01b57ed75badbcb11424d791147663e2cc11f62633dc957a94a70d5b3e601c' 
  AND token = 'kIsUH4oGhYrkWl2syz6rFOhtZVMjorfKuVPQx5iG/SA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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