SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5b3784a18540233b982f7d8780e567b08a69604c8ba5c6f1b187010fa23d30b5' 
  AND token = '+vMl7u6ghS2UArDkAoJ0J5fhU1DGjltwSWLzzCgjn3c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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