Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fecd8a1f31ad736d6c987d03c79d3df4d77f66dbf2d8b546d0d316dc03131f04' 
  AND token = 'fDJO2ti6JKaqoP5pOffYL2eulfg0wTGXEr3EaA6FTGI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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