Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2c4f77a0eca273df3819e49bddbe80ced649f58adbdafddf5e91e58361d7bf1' 
  AND token = '2M8F8zIz6jSIRzScg/3kqu6ZgVHL7och5L7NnFryMZI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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