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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11e015bcd354370dd9117d1f9d994e15c7e9cf8d85293f9ef70249287b28d37f' 
  AND token = 'pvrViMjAIJRoJ85XKXBe/WvKWESXYDQfLBkkU4dMhyc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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