Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7881d88194d4c8dbd9c710a8239dbd88b1060479cd12d2361a3a860de6aeeb7f' 
  AND token = 'PGhb15yRIKEcHP1Jm3vtoA4twF6kqT+KdTjyTmIM2t0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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