Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94abb2b3c5604cf2c829a1191132bcf662ac2c3264c0e489a9534f9c821081f9' 
  AND token = 'Rm4bgFVCvedZ0i0AGjG/AsODg49+ZKfuW5TJwvR3TOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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