Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'adfeafdc3ea86022a7351b32d90375c801ea2c5b93d6b60dd8324f2b5606ad1f' 
  AND token = 'tEQmamSMb8CJBH2/MKYCk/Ro5p476OpvKOuehIRd+14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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