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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '447913e547c2427a350d6bc57c83889eef6e240e8408aba345ac3dac29054a77' 
  AND token = 'sbohZOlmd0VqVII4wDJTSRPJKJjcyn9iTdp7MFtA/90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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