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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0491eb994aca8e872634c8f1d35c63b35cf9ac4259041e50a4707a87c1dd14f7' 
  AND token = 'aRoKC2Jef9ZBQWuoC90ETlcMxsajmdBByOmD6X1A060=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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