Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '61e9b1e832e5c94b40bc2a529be105853fd24b87254b1cfb0b1a0ab3e982d90f' 
  AND token = 'BYWnjj6p5g6veN4yLYjiPx3aPfeDb/wJkviLMYY9KkI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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