Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '853b455ed10f755fef5c6303f090d9157185a1d03bb9c5a6b09537f3c7e7637b' 
  AND token = 'Q/IAc/FIEikQ9VHs6D2OEw89bNP9jhBVHMN3FoD5/bA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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