Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '49a9eadf9e44a6d6a2fe0cf07fa7a1b1d1f876b01deae2c3ddb5d6c1053882c2' 
  AND token = 'VROhZBVPh7FWFY4v7ek6P6S0bpiGiMkZRl+6YrO26FI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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