Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f848655d2faa642a4c5b80140e904db297114a0b7bed38ed2473e359122347d1' 
  AND token = 'GMMqI+jLpqr4Z4pcT2n304Oxvjy/qQQhOlwpLhd/CcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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