Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7135230446d67105964a1d24d38b2f462d56c8ee142b894fcf6794423ee2ca5b' 
  AND token = 'DaOLVntmIx1ZJ69PTe6AIcPpyS4p+hsYkfLajffaotQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00074

JSON explain

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