Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf4450503848c64e811e6b89ae2e80c746a48ecf5c628db29c420203f37bb5b9' 
  AND token = '6PP4jcZs/STAlBoDA3yqk6rRLYSNrVTmFhxZhdipiUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}