SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '44956e518962cf930683210bc4792dd1acaf5fb1a1aa81234f7605b794bf2405' 
  AND token = 'lYYGWvVq17T4rGhV6jbg3ChNQu6ft/XmL5ttQk7nvmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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