Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84e880246942c3dc1b493711c47d70cf409205c7f7c8df426c3959f07e0f525a' 
  AND token = 'pDqY++RKkL5h+M1RPsQ5Mn2bhjY8z362iDTNiCCcYog=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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