SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '130a8a8f63802e1099f67635f12c74985c30ad4122286818e4c25086fb718f65' 
  AND token = 'rir3tHT3K/Vx1NUVzek9mo6u/4w0Vv1jGaG2g4g3Mbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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