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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba22fcdadcd83cf0ebe232a2d2b4f402ef439a70920aa9feee634084ec7529e4' 
  AND token = 'Qsm4OeC9odTS0chXXHXNkHZfLwah0vDEJjxf1Joby/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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