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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc148118bfcae36c446d5f338fd84bea1345beb95562445bdf044c10a4606acd' 
  AND token = 'q7OQ7VgyZ6tzSKc8Nou/AjXPqi4Smlh17juoEuh1kww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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