Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c445510ed564a58649211fffd17e09b3370a5bcd901d5208a316e610137e0c5' 
  AND token = 'L8owMjxbcS6FyVifeUGRwTrS4KLH6/Sc6BJiGfim/pc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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