Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8113ff59007a5d761ee79bfffa55943753ec9b239afd34e1ca57cae9068eb2ce' 
  AND token = 'w4VYQD7HbHMlLjlKXIGojp6egVNVeDMWyV4vOpBM1Cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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