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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ded6fba158c04e7338c571b8caa609b3a7a2126f42e18908a9fae2aeacb65805' 
  AND token = 'g/Vv7i1xJngTsPhb9nEdVy1Lm2Gu1jN2SYf0JtIYn6U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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