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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01a22ddd9ceac54c9692be71a09be66b3be45ac1cae9326b01137896977960e7' 
  AND token = 'V9KOkelCxnn1H0oMLCCvX1ksy4oLwhi/JoC/E/zFyGE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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