Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6567bb7ffee398d0284f24f51fe0f219fb4d5f12183ae329d3bf784bbc1413e7' 
  AND token = 'ER6aPWZqkImAeT8+isUs3m+gJjjDPHxIAkcrjWsX544=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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