Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4781b55d11e0aad95bffa162dd4ada7bdbb0514670f3c8fca7d5930e871761b3' 
  AND token = 'sUq7hrZCehGfzX420OXupq4ecU0goCwRQW2glDBAzFM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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