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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bae730fc2c01748a6d9d983981cb35a187ce313ef9dabf0a883d0231a7dce87' 
  AND token = 'gC6HtFWNO7aq1AICYOgaEpRF29R8/sRCyn0PqWBTKzE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00109

JSON explain

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