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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a6ef7a4a471df0d7a31f522c4ef49d142f987f7cc21147f656a2190eb236ff6' 
  AND token = '1Vv7MXu5rcBMM8mO78QieLCESUDZ+r/UDlKH0krFRaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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