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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e7c5e9099ab4841683a1b0b26d37cde4359bc119a386e84a5d08e249877cc6a' 
  AND token = 'GBe5E0HdVrwYrxx5WdRiwgY4UlqMvqoFBg5PRUwKk2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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