Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e163dbd58239822ca8e38d13dc058e885625448c4379c200dc855aa66ee1801e' 
  AND token = 'epPRoE9XxeV74v1gB4zrVAwbIiKd4ZKEjIrutnsZfnw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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