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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3497a5521ce93817592f3edf56dd01fe88bba1a80bfbb0d04f8aae51d3fd709d' 
  AND token = 'Xbz5xZkeJzjR5PMUgIhizcfSSJ3M1IY8+YEVkpD7whg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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