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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6de9f6163bf06e36d90f8142c56f1dcfde2dfe8108e87ea238492b78ef98e669' 
  AND token = 'cTHAV7UPuBf7/PCxNNV4gMni4zdC94dMXGiGGyFeYWg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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