Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bb7067b0f47b0669b61c382a07fb615feb03a86335f8547b574f1b5ba894930' 
  AND token = 'j24h2VSVLZhWMOBzkjR2BMdJ3lTLHYTzMQRLbHlHDPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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