Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7cbcaa5a79afed61ded5bb7f4d34040ae0111c826348b2ba60043971c4b021d0' 
  AND token = 'xCswhdY4+TtDOPCb0LYAMA9/ZcWLsZ7GSL2FHXF2UBg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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