Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecc1178e55c194c50bc744538f048ac4640d2fb2f9aceda8de21cf099738d95f' 
  AND token = 'RNdSZhkGaJL/Pg94NA0mWopnIHg1D3BLNac21Ctr0w4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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