SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '62582d49b8f0d01b4cc4b085039339d7f8cd9e7c8a9367f8b53465daa4d58a45' 
  AND token = 'xG3fu8sDFpJZpxVawtrgOzgNcaoMUVSyb7FhR5MBjiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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