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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86ea543df30598acf18356fb2336b3f389dfd65b7415231b85adce7bcd64dffe' 
  AND token = 't4HaKa9jk3s40GmNd+Cqxkq2aO1mnE6PZ9a1iRw8j80=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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