Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5401749717ed1805683ac3c2f98677d8e0c68030ef5a92a6a3cea8f94ca5761b' 
  AND token = '72CxxoCy2CPDQOmMw05pnN283MplHn7oK1jQovO0gMc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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