SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '4f8919b8b73a640405e1d4c1136564fbd496aefa71781d6b31c0814ab47a5982' 
  AND token = 'jXXN4WYrSXSS5xq/JI2aQ/xSwsiCl4hVLx85tBHIDek=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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