Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f29a2e9c9a057c9ae2107210d29a34afd92feaf228108385f4397eb4191442c' 
  AND token = 't9wQqfY+R3uzK8mUOakDCHtJC3QplK7Z2QXO4StMJ2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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