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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a4ece79a9509d2e9dd7c8165cc5c1ac2cc9d57eb4fe15ad355040ba56f09c33' 
  AND token = 'ma0TFXKP9lZx6Mhbyc9KsahNtL19OQ6U3cMdQwwumcE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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