Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '91612318196290e084c6e531bd245272586245c145a137e5270781780ad4cc91' 
  AND token = 'OOB1r4gBcCeGCl+eyQvJ7Dk2wKBi+bquRKNTOm5Y7ZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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