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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e660c2c0a77f2db1bb67c5004d8d647400e00bc6b0de7d73c134c34d9535589a' 
  AND token = 'phcs111tKnQjA6cW5nwQUYfnktVc6FnAKB2WJbBWUPg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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