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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d1b430c5d0fb2561c6f2303c843ca46f792b3564c419ac88995b3d0a99125a5' 
  AND token = 'o+cTDnkJmSirWJ549OGSCH1nFgJ6KigtwfWDZa7nX9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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