Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5323629a2b826baf9ec9f1803dfcd0df1259e1d039f29198a2e3ab5b83f904a' 
  AND token = 'UfgNqf7slBCpx5PesdrUEKb/OtlzPqpu1ZnAWxySm7U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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