SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4aa08404d1685c598d31ecddbac1936c8ffc6b0d2aa6e250475964e659e9904b' 
  AND token = 'UGGDGYQPVDusjfCAXHcZ++6y4LMw7yagtrKKIplWbKI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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