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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71386414db33b4f36b24db18ecb4f0f1b393807a352c16797f8d5817f7ba74b6' 
  AND token = '7XuY5fQhy7b6P1cQBEa4HOr6OR4veayEM6YslravihA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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