Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54c0f257b53ea24c2329fbaa19e602b9122afc9a21acc2a42ceab60f92e790b2' 
  AND token = 'eZVFrRWPbl6iGXwonoFH5uWAfdHDkb05IwJAeOIGF70=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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