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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'daf4119ef2b5ab4cea696e458f962b92e35e0020d39e03f5387856093751a661' 
  AND token = '0ABg9AOqHTHuj3QdVO2kRFHF/iDLQ83X8qJUEfR6RM4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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