Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d937bc0964ffc6b84dd9ebde7939dd7afecc4840ecaba7acf02ff3537979f86' 
  AND token = 'TNGxUP4h76+aiCM6OJWBHlnArOnC4k7ryNdz/1shaJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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