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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edd39e414ce38de69c537b07d743e1353dbba20a3b6d5f27c7dc8f60d68291a0' 
  AND token = '3ziTCQdXioMi9Lgpx7v6+JANgiLhNRBJCFEXUIypkdE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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