Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bec70e87aa019f60c15bca1cda760134b4789a41432628b8537cfcbce6fbd80a' 
  AND token = 'V5YqpQtbbildaMVhnTt6zxzFCdgXXrmfQ4ElJWrO0CI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}