Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cbd837fece0af3e5482e51f1b139397e269829cf19ab50f0a42abcd8ea663190' 
  AND token = 'PFeQbpS+5i0d9dB3H0sAQAvZdB1VNxXsQN/JLUOVNgo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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