Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32f0c8e137eb2080658593c997f6869f9cb726ee3454256f4830689aacb9739b' 
  AND token = 'pkoXIY1GI/6x+pFJuoleLbRF3Wwn41J8MbuA3/Usncc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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