SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e5777add3a6510c4699cc8417a165447bee3638b011cd7b75dc45e0f4c214e60' 
  AND token = 'qzRS4grKWQG3Ddb9+CXr/v4FBpvCLhp2g0bzDfFRdmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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