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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60fa2b332af175e17eae74004cd27c6df8e65e581e62ee725e4c05e72fdd09e8' 
  AND token = 'fZHTwHaAaP8Ioq5rnGOgnYq1L5tE75ZVgbX9a80J0EU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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