Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '964d2695f20fdf2884e1576bfd8861c64e0db2391218e317c96fe114c3f6d0b8' 
  AND token = 'hp4CiYMqELkSFf90qciMakvPcaKnp1CJuF8U4AMXHMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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