Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a6291dbb5acdb026a01b43d9d2acd2c2b416ecd9acdf281486e27f476e07456' 
  AND token = 'ZsrALGbDrb3kAxiz2AoC99VFiI8hDPDyZuXc85d+Jho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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