Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d891eafc64f1d9a225a3f8f92556887769736c4e528ec7e47132ff924e36869' 
  AND token = '7HMxxvBaZsFlcnq3NUlbpTLq8O2QcQO6+kV0F+/829k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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