Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e45dd80b66eefb0c4e95eb0bbaeb236a9e3c9afd8b08c3ff07efca028930b36f' 
  AND token = 'U9pL6w8TFteQIPSXKB0AHkQwOERyVptzABhsghR7/Nk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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