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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2fb0796b6ac33f90471c37894603d6a151a485ab6a26b70b5988ca092e686e6f' 
  AND token = 'b1BYnQa6Q2ZTk7cwKJsRdv8YYlC6o3O6J+icxm98ioU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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